Percent s
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Percents
Warm Up
a) Name the Property:
b) Simplify
4323423 xx
Distributive Property
13
5
13
135
13
13
13
5
What is a percent?
25% 25 per hundred
25%
25% 0.25
25
100
Change to a decimal.
1. 8%
2. 15%
3. 312%
4. 4.37%
.08
.15
3.12
.0437
Change to a reduced fraction
1. 12%
2. 8%
3. 125%
4. 60%
25
3
100
12
25
2
100
8
4
5
100
125
5
3
100
60
Change to a percent
1.
2.
3.
0.40 = 40%
0.75 = 75%
0.2857 = 28.57%
2
5
3
4
2
7
Six-sevenths of Ms. Kay’s girl scout troop planned to attend a field hockey game. Approximately what percent of the troop was that?
A. 15%
B. 76%
C. 80%
D. 86%
Answer…..
%86%7.85857.7
6
Four-ninths of the class failed. Approx. what percent was that?
Answer……
%44444.9
4
Solving Proportions
7
15 21
x 5 3
10n
8.9
14715
)21)(7(15
x
x
x
7.16
503
)10)(5(3
n
n
n
You try! Solve the following:
8 2
5m
12
30 5
x
Answers……
20
4025
28
m
mm
2
6030530
12
x
x
x
Setting up proportions for a percent…..
100
p
Of
Is
What percent of 80 is 18?
%5.22
18008010080
18
p
p
p
What percent of 10 is 4?
%40
4001010010
4
p
p
p
What is 12% of 94?
28.11
1128100100
12
94
n
n
n
147 is 14% of what?
1050
1470014100
14147
n
nn
What percent of 1.2 is 6?
%500
6002.11002.1
6
p
p
p
13.2 is 55% of what?
24
132055100
552.13
x
xx
What is 0.4% of 800?
2.3
320100100
4.0
800
x
x
x
What is 75% of 68?
51
5100100100
75
68
n
n
n
5 is 200% of what?
5.2
500200100
2005
x
xx
What percent of 54 is 28?
%85.51
28005410054
28
p
p
p
114 is 95% of what?
120
1140095100
95114
x
xx
What percent of 20 is 31?
%155
31002010020
31
p
p
p
What is 35% of 15?
25.5
525100100
35
15
x
x
x
Homework
Worksheet on Percents
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